US6280845B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer films having at least five film layers, wherein at least one layer is flame retardant
Assignee: 3M Innovative Properties Co
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Filing: 1998-11-30
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Granted: 2001-08-28
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Expires: 2018-11-30
Abstract
Abstract The present invention provides unified multilayer films having at least one layer that includes a flame retardant film layer. In preferred embodiments the flame retardant film layer is an internal layer. In particularly preferred embodiments of the present invention, multilayer films include flame retardant layers alternating with non flame retardant layers. In other preferred embodiments, multilayer films include alternating layer of different flame retardant materials.
Inventors
- 👤 Richard A. Kollaja
- 👤 Douglas A. Devens
- 👤 Patrise M. Russell
- 👤 Mark A. Hoisington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:58
CPC Classifications
B; B32; B32B; B32B27/00; B32B7/00; B32B7/04; B32B7/12; B32B7/02; B32B7/027; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/14; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/24967; Y10T428/24975; Y10T428/28; Y10T428/2848; Y10T428/31504; Y10T428/31551; Y10T428/31786; Y10T428/31855; Y10T428/31931; Y10T428/31938
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
51 words
A unified multilayer film of at least five continuous film layers wherein at least one layer comprises a flame retardant film layer and at least one layer comprises a non-flame retardant film layer, wherein the flame retardant film comprises a halogenated organic flame retardant additive incorporated into a melt processible polymer.
Claim 2
Dependent Claim
51 words
A unified multilayer film of at least five continuous film layers wherein at least one layer comprises a flame retardant film layer and at least one layer comprises a non-flame retardant film layer, wherein the flame retardant film comprises a halogenated organic flame retardant additive incorporated into a melt processible polymer.
Claim 3
Dependent Claim
18 words
The multilayer film of claim 1 wherein at least one internal layer comprises a flame retardant film layer.
Claim 4
Dependent Claim
18 words
The multilayer film of claim 1 that comprises flame-retardant film layers alternating with non flame retardant film layers.
Claim 5
Dependent Claim
21 words
The multilayer film of claim 3 wherein the flame retardant of the flame retardant films layers comprises the same flame retardant.
Claim 6
Dependent Claim
20 words
The multilayer film of claim 3 wherein the flame retardant of the flame retardant films layers comprises different flame retardants.
Claim 7
Dependent Claim
22 words
The multilayer film of claim 1 wherein the flame retardant additive comprises a mixture of two or more different flame retardant additives.
Claim 8
Dependent Claim
17 words
The multilayer film of claim 1 wherein the two outermost layers comprise a non flame retardant film.
Claim 9
Dependent Claim
9 words
The multilayer film of claim 1 which is oriented.
Claim 10
Dependent Claim
23 words
The multilayer film of claim 1 comprising a flame retardant film layer, a non flame retardant film layer, and a tie layer therebetween.
Claim 11
Dependent Claim
11 words
The multilayer film of claim 1 comprising at least ten layers.
Claim 12
Dependent Claim
20 words
The multilayer film of claim 1 further comprising at least one pressure sensitive adhesive layer on at least one surface.
Claim 13
Dependent Claim
23 words
The multilayer film of claim 1 wherein the flame retardant additive comprises from 10 to 90 weight percent of the unified multilayer film.
Claim 14
Dependent Claim
22 words
The multilayer film of claim 1 wherein the flame retardant additive comprises 40 wt. % or more in each flame retardant layer.
Claim 15
Dependent Claim
21 words
The multilayer article of claim 1 , wherein said melt processible polymer is a thermoplastic, a thermoplastic elastomeric or elastomeric material.
Claim 16
Dependent Claim
27 words
The multilayer article of claim 14 , wherein said melt processible polymer is selected from the group consisting of homo- and copolymers of ethylene, propylene and butylenes.
Claim 17
Dependent Claim
42 words
The multilayer article of claim 14 , wherein said a thermoplastic elastomeric material is selected from the group consisting of styrene-isoprene block copolymers, styrene-(ethylene-butylene) block copolymers, styrene-(ethylene-propylene) block copolymers, styrene-butadiene block copolymers; polyetheresters; elastomeric ethylene-propylene copolymers; thermoplastic elastomeric polyurethanes; polyvinylethers; and poly-α-olefins.
Claim 18
Dependent Claim
14 words
The multilayer article of claim 1 wherein said flame retardant is an antimony-halogen additive.
References Cited (Backward Citations)
US2736721A
Cited
USRE24906E
Cited
US3645837A
Cited
US3650880A
Cited
US3565985A
Cited
FR2187516A1
Cited
US4201820A
Cited
US4107232A
Cited
US4488619A
Cited
US4673695A
Cited
US5461134A
Cited
US4927647A
Cited
US4833179A
Cited
US4792480A
Cited
US4818603A
Cited
US4975316A
Cited
US5344697A
Cited
US5209971A
Cited
US5160784A
Cited
US5599602A
Cited
US5660922A
Cited
US5589122A
Cited
US5250350A
Cited
US5427842A
Cited
US5389324A
Cited
AU3305195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-08-27 | 2005-02-26 | 2005-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-08-27 | 2009-02-26 | 2009-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-08-27 | 2013-02-26 | 2013-08-28 | $7700.00 | Window Closed / Lapsed |